Abstract: A memory system includes a memory area. A controller controls data. A first connector inputs the data and/or outputs the data, and is removable from the host. A first holding part is electrically disconnected from the memory area and the first connector and including a first port, and holds identification information used to authenticate an authority to initialize the memory area. The first port outputs the identification information to the host when receiving, from the host, an initialization command that instructs initialization of at least the part of the memory area. The controller includes a second port and an authentication part. The second port receives the initialization command from the host and receives the identification information via the first port. The authentication part executes initialization of at least the part of the memory area based on the initialization command and the identification information received at the second port.

Abstract: According to one embodiment, a memory system that is connectable to a host includes a nonvolatile memory and a controller. The controller is configured to generate an identifier of a data object to be written in response to a write command from a host, then transmit the identifier to the host. The controller causes the data of the data object to be stored in the nonvolatile memory and maintains a table providing a correspondence between the identifier and a storage position for the data of the data object in the nonvolatile memory.

Abstract: A storage device includes a storage and a controller. The controller can control data write to the storage and data read from the storage. The controller includes a first processor, a second processor, a first bus, a memory access control device, and a second bus. The memory access control device can manage a memory access control information table. The memory access control information table stores access control information indicating a range of each of areas of the memory and an identifier associated with each area. The memory access control device can compare the identifier output to the first bus with the identifier in the memory access control information table, and determine whether to allow the access to the memory requested by the second processor.

Abstract: A storage device includes a storage and a controller. The controller can control data write to the storage and data read from the storage. The controller includes a first processor, a second processor, a first bus, a memory access control device, and a second bus. The memory access control device can manage a memory access control information table. The memory access control information table stores access control information indicating a range of each of areas of the memory and an identifier associated with each area. The memory access control device can compare the identifier output to the first bus with the identifier in the memory access control information table, and determine whether to allow the access to the memory requested by the second processor.